def add(self, content, marker=None):
old_crontab = self.get(hide_stdout=True)
marker = _marker(marker)
self.set(old_crontab + '\n' + content + marker)
return marker
add_line(content, marker)
def remove(self, marker):
""" Removes a line added and marked using add_line. """
marker = _marker(marker)
lines = [line for line in self.get(hide_stdout=True).splitlines()
if line and not line.endswith(marker)]
self.set("\n".join(lines))
